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What are microspheres?

We define microspheres as spherical particles greater than 1micron and smaller than 1000micron (or 1mm) in diameter. Microspheres with diameters between 1micron and 10micron are larger than nanospheres, but on the bottom edge of microsphere particle sizes, and, therefore, we put them in their own Fine microspheres category.

What are different grades of microspheres?

We offer microspheres in various grades, defined by their particle size distribution. The tighter the particle size requirements, the more monodisperse the distribution, the smaller the tolerances, the more precise the microspheres, which also typically makes them more expensive. If the particle size distribution is wider, and the tolerances are larger, the diameter of each microsphere might fall into a larger range, which makes the product more economical. We arbitrarily divided microspheres in three grades: Spacer/Calibration/Monodisperse Grade, Classified Grade, and Bulk Grade.

What are spacer microspheres? What are monodisperse microspheres?

Spacer or Calibration grade, also known as Monodisperse Microspheres, is the most precise grade we offer. In this grade of microparticles greater than 95% of individual microspheres have the diameter that falls within the defined particle size (diameter) range. This is the most expensive grade due to the extensive processing time and intensive quality control process involved in manufacturing of this grade of product. Spacer spheres are invaluable for applications where precise bondline thickness and gap control are paramount.

What does "classified microspheres" mean?

Classified grade microspheres means that greater than 90% of microspheres are guaranteed to fall between the lower and upper diameter limits as specified. Most of Cospheric's products are produced in classified grade. It is a happy medium and a compromise between quality and price, for those applications that can tolerate some distribution of diameters. The lower and upper diameter parameters are clearly defined.

What are bulk grade microspheres?

Bulk grades of microspheres have the lowest requirements and typically a much wider range of diameters, which are defined individually for each product and might vary from product to product. This is the most economical option for applications where the exact microsphere diameter is not critical.


Products 1-56 of 68
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Highly Opaque White Polyethylene Microspheres, Polymer Beads, Particles
Item #: WPMS -
Price: $103.95-$372.75
Item #: WPMS - View

Polyethylene microspheres are hydrophobic and need to be coated with a surfactant prior to suspending in water. We recommend Tween 80 Bio-compatible Surfactant. Several densities available: WPMS -... [more info...]

Microspheres, Spheres, Micro beads - PMMA - Poly(methyl Methacrylate) - Acrylic Spherical Particles
Item #: PMMA -
Price: $112.50-$289.00
Item #: PMMA - View

PMMA polymer is an amorphous, transparent and colorless thermoplastic that is hard and stiff. It has good abrasion and UV resistance and excellent optical clarity. PMMA spheres are soluble in... [more info...]

Polystyrene Microspheres 1.07g/cc - highly spherical thermoplastic biocompatible microparticles
Item #: PSMS -
Price: $261.00
Item #: PSMS - View

The spheres are in their most pure form, with no surface functionalization, coatings or colorants added. Crosslinked polystyrene is inert, chemically stable, and safe for handling. The primary... [more info...]

Bulk Grades of Solid Soda Lime Glass Microspheres 2.5g/cc. Optional Fluorochemical and Silane Coatings.<br>Mean Diameters 3-6um, 8-12um, 35-45um, 65-75um.
Item #: P2000 -
Price: $52.50-$174.00
Item #: P2000 - View

P2011SL: Average diameter between 3 and 6 microns, with a top size of 20 microns. P2015SL: Average diameter between 8 to 12 microns, with a top size of 36 microns. P2050SL: Average diameter between... [more info...]

Black Paramagnetic Polyethylene Microspheres 10um to 1mm in Diameter. Paramagnetic microspheres have the ability to increase their magnetization with an applied magnetic field and decrease their magnetism when the field is removed.
Item #: BKPMS -
Price: $103.95-$372.75
Item #: BKPMS - View

Paramagnetic microspheres have the ability to increase their magnetization with an applied magnetic field and decrease their magnetism when the field is removed. No residual magnetization is... [more info...]

Bondline Spacer Spheres - Monodisperse Solid Soda Lime Microspheres - Calibration Grade Beads
Item #: S-SLGMS -
Price: $131.25-$495.00
Item #: S-SLGMS - View

Bondline spacer grade solid soda lime glass microspheres are available with tight particle size ranges to achieve bondline thickness (gap) from 10micron (0.01mm) to 500micron (0.5mm). Bondline... [more info...]

UVPMS-BG Fluorescent Spectra (Excitation & Emission curves)
Item #: UVPMS-BG-1.025 -
Price: $103.95-$298.50
Item #: UVPMS-BG-1.025 - View
Fluorescent Green Polyethylene Microspheres<br>Bright Green Polymer Beads Density 1.015g/cc
Item #: UVPMS-BG-1.015 -
Price: $103.95
Item #: UVPMS-BG-1.015 - View

Density: 1.01-1.02g/cc Daylight Color: Fluorescent Green (515nm Peak) Fluorescent Response: Peak emission of 515nm when excited at 414nm Particles in Size Range: > 90% Spherical Particles: >... [more info...]

Fluorescent Green Polyethylene Microspheres<br>Bright Green Polymer Beads Density 1.01g/cc
Item #: UVPMS-BG-1.01 -
Price: $103.95-$215.00
Item #: UVPMS-BG-1.01 - View

Density: 1.00-1.02g/cc Daylight Color: Fluorescent Green (515nm Peak) Fluorescent Response: Peak emission of 515nm when excited at 414nm Particles in Size Range: > 90% Spherical Particles: >... [more info...]

Fluorescent Green Polyethylene Microspheres<br>Bright Green Polymer Beads Density 1.02g/cc
Item #: UVPMS-BG-1.02 -
Price: $103.95
Item #: UVPMS-BG-1.02 - View

Density: 1.015-1.025g/cc Daylight Color: Fluorescent Green (505nm Peak) Fluorescent Response: Peak emission of 515nm when excited at 414nm Particles in Size Range: > 90% Spherical Particles: >... [more info...]

Fluorescent Green Polyethylene Microspheres Density 1.035g/cc<br>Bright Green Polymer Spherical Microbeads
Item #: UVPMS-BG-1.035 -
Price: $103.95-$215.00
Item #: UVPMS-BG-1.035 - View

Density: 1.03-1.04g/cc Daylight Color: Fluorescent Green (515nm Peak) Fluorescent Response: Peak emission of 515nm when excited at 414nm Particles in Size Range: >90% Spherical Particles: >90%... [more info...]

Fluorescent Red Polyethylene Microspheres Density 0.99g/cc Bright Fluorescent Red Particles 605nm Peak
Item #: UVPMS-BR-0.995 -
Price: $103.95-$372.75
Item #: UVPMS-BR-0.995 - View

Density: 0.985g/cc - 1.005g/cc (Designed for Water Suspension)Daylight Color: Fluorescent Red (607nm Peak) Fluorescent Response: Fluorescent Red under 300-550nm wavelengths. Works well with Green... [more info...]

Borosilicate Solid Glass Microspheres 2.2g/cc<br>Many Sizes 20micron to 6150mm
Item #: BSGMS -
Price: $131.25-$313.95
Item #: BSGMS - View

Solid borosilicate glass microspheres are available in a large variety of particle size ranges from 10um to 6150um. Microspheres are supplied as a dry powder. [more info...]

300 Series Stainless Steel Microspheres
Item #: SSMMS -
Price: $103.95-$261.00
Item #: SSMMS - View

Particles in Size Range: >90% Sphericity: >90% Density: 7.7-7.9g/cc Vickers Hardness: ~200HV [more info...]

Fluorescent Yellow Microspheres Density 1.00g/cc for Flow Visualization and PIV<br>Bright Fluorescent Yellow-Green Particles with UV and Visible Illumination
Item #: UVPMS-BY2-1.00 -
Price: $103.95-$372.75
Item #: UVPMS-BY2-1.00 - View
Fluorescent Yellow Microspheres Density 1.02g/cc for Flow Visualization and PIV<br>Bright Fluorescent Yellow-Green Particles with UV and Visible Illumination
Item #: UVPMS-BY2-1.02 -
Price: $215.00
Item #: UVPMS-BY2-1.02 - View
Fluorescent Polymer Spheres (Green) 1.100g/cc density
Item #: UVPMS-BG-1.100 -
Price: $215.00-$447.75
Item #: UVPMS-BG-1.100 - View
Retroreflective Half-Shell Aluminum Coated Solid Glass Microspheres
Item #: P2453BTA -
Price: $103.95-$557.00
Item #: P2453BTA - View

The spheres are offered in dry powder form with the following coating options: Uncoated - no surface treatment Silane Coating (S2) - for improved dispersion in aqueous systems (~76 degree contact... [more info...]

Fluorescent Orange Polyethylene Microspheres Density 1.00g/cc<br>Spherical Bright Orange MicroBead Polymer Particles for Flow Visualization and PIV
Item #: UVPMS-BO-1.00 -
Price: $103.95-$215.00
Item #: UVPMS-BO-1.00 - View
Fluorescent Orange Polyethylene Microspheres Density 1.015g/cc<br>Bright Orange Polymer Spherical MicroBeads
Item #: UVPMS-BO-1.015 -
Price: $103.95-$215.00
Item #: UVPMS-BO-1.015 - View
Fluorescent Orange Polyethylene Microspheres Density 1.030g/cc<br>Spherical Polymer Particles Fluorescent in UV Light
Item #: UVPMS-BO-1.03 -
Price: $103.95-$215.00
Item #: UVPMS-BO-1.03 - View
Blue Polyethylene Microspheres Density of 1.00g/cc <br>Spherical Particles for Flow Visualization and PIV
Item #: BLPMS-1.00 -
Price: $103.95-$372.75
Item #: BLPMS-1.00 - View

Blue polymer spheres with specific gravity of 1.00g/cc are designed to match the density of water for optimal suspension of particles, enabling visualization and characterization of fluid flow for... [more info...]

Bright Blue Polymer Spherical MicroBeads. Spherical particles with density of 1.08g/ml are designed to match the density of white blood cells and enable analyzing, studying, and modeling the behavior of blood.
Item #: BLPMS-1.08 -
Price: $103.95-$372.75
Item #: BLPMS-1.08 - View
Barium Titanate Solid Glass Microspheres and Spheres
Item #: BTGMS -
Price: $52.50-$895.00
Item #: BTGMS - View

Barium Titanate glass spheres offer a higher Refractive Index (n) than most other glass formulations. Depending on the grade of material, reflecting index of Barium Titanate glass is between 1.9 to... [more info...]

Aluminum-Coated Solid Barium Titanate Glass Microspheres 4.2g/cc - 30-100um Diameter
Item #: BTGMS-Al -
Price: $131.25
Item #: BTGMS-Al - View

Physical Characteristics: Coating: Fully Aluminum Coated (~500nm thickness) Core: Solid Barium Titanate Glass Spheres Density: ~4.2g/cc Appearance: Grey powder [more info...]

Red Polyethylene Microspheres Density 1.065g/cc<br>Bright Red Polymer Spherical Microparticles
Item #: REDPMS-1.055-1.065 -
Price: $103.95
Item #: REDPMS-1.055-1.065 - View
Red Polyethylene Microspheres Density 1.09g/cc<br>Bright Red Polymer Spherical Microbeads
Item #: REDPMS-1.09-1.10 -
Price: $103.95
Item #: REDPMS-1.09-1.10 - View
Yttria Stabilized Zirconia Microspheres and Spheres 6g/cc - 45um to 1600um (1.6mm) yttrium stabilized zirconia powder, spherical powder, microspheres, microbeads, particles, density of 6.0g/cc
Item #: YSZ -
Price: $99.00-$197.50
Item #: YSZ - View

Yttria-stabilized zirconia microspheres and spheres (ZrO2 / Y2O3) are supplied as a dry powder. With operating temperatures up to 1000°C, a melting point of ~2700°C, and density of ~6g/cc, these... [more info...]

Conductive Silver Coated Poly(Methyl Methacrylate) Acrylic Microspheres
Item #: PMMA-AG -
Price: $99.00-$348.50
Item #: PMMA-AG - View

Sphericity varies by Product Code: PMMAMS-AG: These are highly spherical particles. Greater than 95% of particles are spherical. PMPMS-AG: Also highly spherical grade, with occasional minor... [more info...]

Barium Sulfate White Polyethylene Polymer Microspheres - Particles for MRI or X-Ray Medical Applications - Density of 1.5g/cc
Item #: BSPMS -
Price: $157.00-$261.00
Item #: BSPMS - View

White barium sulfate polyethylene microspheres are supplied in dry powder form and are stable in solution. Polyethylene microspheres are hydrophobic and need to be coated with a surfactant prior to... [more info...]

Conductive Silver-Coated Glass Microspheres, Beads, Particles
Item #: SLGMS-AG -
Price: $103.95-$261.00
Item #: SLGMS-AG - View

Also see: Other Conductive Spheres: Conductive Silver Metal Coated Microspheres Other Soda Lime Spheres: Solid Soda Lime Glass Spheres and Microspheres ... [more info...]

Conductive Silver Metal Coated Hollow Glass Microspheres
Item #: HGMS-AG -
Price: $103.95-$1,555.05
Item #: HGMS-AG - View

Conductive hollow glass microspheres have low particle densities and so provide a significant weight reduction when used in place of conventional conductive fillers such as solid silver particles. A... [more info...]